helcoid

例句：

1. 1.The helicoid was a fascinating object that could rotate around its axis.
   螺旋状物体是一个令人着迷的物体，它可以围绕其轴旋转。
2. 2. The helicoid was used to study the properties of materials under extreme conditions.
   螺旋状物体被用于研究材料在极端条件下的性质。
3. 3. The helicoid was designed to be lightweight and durable, making it ideal for outdoor applications.
   螺旋状物体设计为轻便耐用，使其非常适合户外应用。